Q1.) Note on presbyopia
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Answer:
Presbyopia is a normal part of the aging process. It occurs due to hardening of the lens of the eye, causing the eye to focus light behind rather than on the retina when looking at close objects. It is a type of refractive error along with nearsightedness, farsightedness, and astigmatism.
Explanation:
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Answer:
Presbyopia is a diseases of an eye caused due to weaking of ciliary muscles or reduce in flexibility of an eye to adjust its focal length.
the disease is mostly caused due to ageing or old age.
The spectacles use is bifocal lens.